Type-writing machine.



A. W. SMITH.

TYPE WRITING MACHINE. APPLIGATION FILED I)E0.17, 1912.

1,061,639, Patented May 13, 1913.

4 BEEBTS-SEEET 1.

wlwzaazi HI AT-TWM A. W. SMITH.

TYPE WRITING MACHINE.

APILIUALION FILED 0501'], N112 1,061,639. Patented May 13, 1913.

4 SHEETS-SHEET 2.

\A/ITNEEISEi INVENTDR;

HEATTUR'NEV WWW A. W. SMITH.

TYPE WRITING MACHINE.

APPLICATION FILED DEG.17,1912.

Patented May 13, 1913.

4 SHBETSSHEET 3.

WEATTURNE[ A. W. SMITH.

TYPE WRITING MACHINE.

APPLICATION FILED DEG.17, 1912.

1,061,689. Patented May 13, 1913.

4 SHEETS-SHEIIT 4.

UNITED STATEESPATENT OFFICE ART U W. smirn, or nnw' ronn; mQnssienOn,BYMESNE nsemmtnit rsfro REMINGTON TYPEWEITEECOMPANY, ILION, NEW YORK, A.CORPORATION "OF 3 women;

new YORK.

rrrnwmmme mnonmn Specificationof Lettersiatenh Patented May 13,

To all whonte't mayconc erh Be it known that I, ARTHUR of the borough ofManhattan, city of New York in the co-iinty ofNewifiYork and State ofNew YOIk, have invented certeinnew and useful Improvements in Type-Writing following isle specii i normal position after havingafi'ordedafnll Jetteffeed movement of the carriage. Fig. 6 1S a'frngmentaryvertical fore and aft sec- 'tlonelviewof the escapement mechanismMachines,- of which the fication.

chines and more particularly to yeriable carriagefeetl mechanism.

By my invention, astshown in the present instance, I provide carriageescapement mechanism which effortlsdifierent extents of feed. dependingon the particular keys which are actuated so, for example, that ecomparatively short feed of thecerriage may be afforded Whenprinting acharacter which occupies but little widthwise space land a comparativelylong feed of the carriage is afforded when prlnting acharecter vhichoccnpies a greater wldi lhwlfiie space.

The main ObI|ECtSiOf my nvent on, generally stated are toyprovidecomparntiy-ely lianism of the character specified simple rnec iand one which 15 eflicient and rel able n actionnnd can be readilyintroduced nto existingforms of typewriting niachines Without modifying,(JlilI lfiltl'lllly modifying, the structural featuresof said machinesas they now exist. 1

To the above and other endsvlwhichfwill hereinafter appear, myinventionconsiete in y, es

the features ofconstruction, arrangements 'of parts and combinations 0fdE3VlCe SSGtforth in the following description antiperyticnlarly pointedout the appended claims.

,In the accompanyingdrawings wvherein like reference charactersindicetefcorresponcling parts'i nthe various views, Figure f 11 is afragmentary vertical foreand eftseo tional view of a, No. 10 or 'No. 11Remington machine embodying myfinvent-ion5 although some of i the partsare omitted and Others I thatere shown are onlyconyentionellyrepresented, Fig is a fragmentary enlarged deteilrea-relevation, partlyin section, of a portion of the escapeinent mechanism, i the perts beingehownzis they appear when in the normal posltion, or posltion ofrest.

3; is a side elevation: I Of thB same parts in section. Fig. 4isanenlargedyde tailfragmentary frontelevation Ofe portion Applicationfiled December 17, 1912. Serial to. 137,241;

MV invention relates to typewriting nia partsrlisposecl as they appearat the ,termi nat onolithe down stroke ofe printingkey that controls atype Or types which require the greettitt extent of carriage feed. Fig.5 s i l ke View oftheeeme showing the parts d sposed as they appearafter the keyhas been released t nd the parts are returned to tion ofthe same with parts in section, the

ivietv showing' the parts disposed in the seine posit ons that theyoccupy in Fig; 6. FigQB 1 of theeecapeinentmechanism showin -th t seicitizen of the United States, and resident end some of the associatedparts, the View.

is a fragmentary detailperspective View of 1 l the so'acalled auxiliaryuniversal bar andone ofthe adjustable; contact devicesfcerried thereby.Fig. 9 is a transverse sectional view taken on't-hefline team of Fig.1and looking inthe direction of the arrow ateaid line, theview showingthe key levers and mixiliary nniversalbarl f I I ha ve shown inventionembodied in the present inst-zineeina N0. IOOnNO. '11 Remington ma chinein which the invention may be readily included Without modifying, ormaterially modifying, thestriicturtilfea hires said nnchines as they nowexistiex cent inso far as some ofthe part9 ordinamy employed may bereplaced by thm-iedisjclosed herein. It should be underetood, hoxvever,that the intention may be einbodied in various stylesbf typewritingniacfhines endihat various changes I W be inacleto facilitate jsuchembodiment of the invention. V i y t Theiframe of the machine comprisesa base Iycornerposts 2 and a top plate 3. A,

carriage 4 supports it rotetit'e cylindrical platen 5 and isintirnntedonball or roller hearings 6 formoveinent fromside to side of "the n achineoverjjthe top late thereof.

Thera'rriage is propelled in its letter feed movement from right toleftby the usual spring drum 7 operat-ively connected with the carriageby a strep'or hand Arms 9 nrepi totedet 10 on the'carriflge and extendrearwnrdly therefrom where it they r are con- ;neoted to a feed rack 11;which meshes with the usual feed pinion 12. Thisfeed pinion isfixed tothe forward end of a shaft 13 which is mounted to turn in a bearingsupport 14 fixed to the top plate of the machine, From an ins ection ofFig. 3 it will be seen that a hub-lilie member 15 is carried by theshaft 13 and is fixed thereto by set screws 16. These screws arereceived in tapped openings in the hub 15 and bear at their inner endsagainst flattened faces 17 (see Fig. 2) on the s'haft 13. This hub-likemember is therefore fixed to turn with the shaft 13.

' The hub is formed with a circumferential flange 18 and an escapementwheeler rack 19 is formed with a central opening'20 by which it may bereceived and supported on a circular shoulder 21 formed on the hub.

Screws 22 extend through openings in the flange 18 and are received intappe openings in the escapement wheel tori idly secure th' eecapementwheel to the hu 15; A back spacing wheel 23 may be secured to the hub 15by'screws 24. It will be understood therefore that the shaft 13, hub.15, escape- 'ment wheel 19 and back spacing wheel 23 extending arm orsupporting member 59 of are all rigidly connected to turn together.

The type actions shown are such as those commonly employed in the No. 10and No.

' 11 Remington machines. Thus the key actuated devices or key levers 25and 25" have finger keys 26 and 26* and are fulcrumed on a fulcrum bar27. The returning 5 rings 28 are each connected at one end to a ey leverv and at its opposite end to a plate 29 secured to the base of themachine. Each key lever is connected to an upwardly andrearwardlystriking type bar 30 through intermediate actuating links 31 and 32 anda sub-lever 33. The various type bars are segmentally arranged andadapted to move upwardly and rearwardly to strike against the front faceof the platen.

Arranged transversely of the machine beneath the series of key levers isthe ordinary universal bar 34 with which vertically adjustable contactscrews 34" which are carried by the key levers are adapted to engage toactuate the universal bar. bar is connected by upwardlyextending links35 to crank arms 36. These. crank arms project rearwardly from a rockshaft 37 which is pivoted at its ends on bearing .screws 38 (see Fig. 9)carried by the base of the machine. A centrally disposed rearwardlyprojecting crank armj39 also projects from the rock shaft 37 and has aslot 40 in the rear end portion thereof. This slot receives a pin41'which is carried by an upwardly and rearwardly projecting link 42,which latter is pivoted at its upper end to a forwardly projecting arm43 of a dog rocker which is designated as a whole by the referencenumeral 44. A The trunnion-like pivots 45 and 45 of this dog rocker arereceived at their ends in bearing blocks 46 by the bracket plate 48.

This universal and these latter are supported bearing openings in lugs47 formed on abracketplate 48 supported on the top plate of the machine.Each bearing block 46 is held in place by. ascrew 49 received in atapped opening in the associated lug 47 and bearing atits inner endagainst the associated bear-v ing block 46. A contractile spring 50 isconnected at one end to the type bar segment and at its opposite end tothe crank arm 39 to return theuniversal bar and the parts connectedtherewith to normal position. The dog rocker is also provided with areturning spring to return it and the link 42 to normal position. Thus adepending pin 51 is carried by the dog rocker and is connected to oneend of a contractile spring 52; .Theopposite end of this spring isconnected to a plate or arm 53 which is carried The dog rocker carriesand 55. The loose dog 55 is pivoted at 56 on a rocking member, plate orcarrier 57 which is pivoted by means of a headed, shouldered, pivotscrew 58 on an upwardly the dog rocker. The tail piece 60 of the pivoteddog 54' is adapted to bear against the member 57, to limit the pivotalmovement of the dog 54 in one direct-ion around its pivot 56. Anexpansion spring 61 bears at one end against the member 57 and at itstwo loose dogs 54 be seen that a contractile spring 62 is connected atone end to a in 63 which pros jects from the member 5 and is connectedat its opposite end to a 'pin64 which projects rearwardly from theupright arm 59 of the dog rocker. The power of this spring 62 tends toturn the member 57 from right to left, as the parts appear in Fig. 4,around its pivot 58. The pivotal movement of the member 57 is limited bya screw stop 65 carried by the arm 59 and received in a slot or opening66 formed in the body of the member 57. The ends of the slot 66cotiperating with the stop pin 65 limit the pivotal movement of the dogcarrying member 57 in opposite directions. Fig. 5 represents the partsas they appear, when in the normal position and from which will be-seenthat a tooth of the escapement wheel normally engages the dog 54 andholds it, and the carrier 57 on which it is mounted, in the right-handposition against the power; of the spring 62. If a reverse movement begingthe dog on "54 out of engagement with the tooth turns to normalposition.

given to the escapement wheel at this time it will merely result in therear faces of the teeth of the escapement wheel engaging the rearinclinedface of the feed dog 54, turnits pivot 56 against the ressure ofthe spring 61 as the teeth o the escapement wheel are successivelybrought into contact with the feed dog. The second feed dog 55 is '5.lugs 68 whic project fromv the upwardly extending arm 59 of the dogrocker. An expansion spring 69 is received at one end in an openin inthe arm 59 and bears at its opposite en in a corresponding opening inthe feed dog 55. The force of this spring is exerted to normallymaintain the feed dog in i the position shown in Figs. 2 and 5. The tailpiece vof this feed dog 55 extends downwardly from the pivot 67 and inthe normalfpositions of the parts represented in Figs. 2 and 5, bearsagainst an abutment 71 which is formed as a part of the rocker armbetween the supporting lugs 68; The tail piececooperating with thisabutment limits the movement of the dog 55 from right to left, as theparts are shown in Fig. 5. The extent of movement of each loose dogpreferably corresponds to about halfof the full letter space movement ofthe carriage. The

operation of the escapement to afiord ajfull letter space moivermant is,therefore, to give a so-called half-and-half drop that is to say, a halfletter-space drop of the carriage {at the downstroke of the key and ahalf letter-space drop of the carriage on the upward movement of thekey. Thus when a full letter-space printing key 26 is depressed thecont-act screw 34? carried thereby, will engage the universal bar 34 andeffect a rocking of the dog rockerthrough the intermediate connections35, 37, 39- and 42. A

forward movement of the dog rocker thus produced is efiective to movethe feed dog a (Fig. 2) of the escapement wheel which was engagedthereby and'to carry the loose dog 55 into the path of the secondpreceding tooth c of the escapement wheel, as will be underw'istood froman inspection of Fig. 2; A re lease of the dog 54 thus eiiectedenablesthe spring 62 to turn the supporting member 57 together with thedog 54 which is carried thereby, from a position such as is shown inFig. 5 to a position corresponding to that represented in Fig. 4. Inthis last mentioned position the dog 54 will be so located as to engagethe next advancing tooth of the escapement wheel when the dog rocker reThe depression of the finger key which eifected a release of the dog 54'in the manner described, also brought the loose dog 55 into the path ofthe second tooth 0 (Fig. 2) of the'escapement aswhcel from thatengaged'by the dog 54.

pivoted at 67 between bearing The escapement wheel being thus releasedfrom control of the dog 54 advances under the power. of the spring drum.This advance continues until the tooth c on the wheel to the right ofthe .dog 55, as the parts appear in Fig. 2, engages the dog 55 and movesit against the pressure of its spring 69cuntil the dog isarrestedthrough itsen gagement with a contact face 72 on the 11pright arm 59 ofthe dog rocker, as shown in Fig.4. This figure shows the parts as theyare disposed at the termination of the downstroke of a so-called fullletter-space key 26.

When pressure on this key is released the upri ht arm of the dog rockermoves rearwar 1y, thereby bringing the feed dog 54 i into the path ofthe tooth con the escapement wheel and disengaging the feed dog 55 fromthis tooth c. The power of the carriage spring, exerted through theescapement wheel, exerts its forcea-gainstthe dog 54 and returns it,together with its carrier 57 around the pivot 58 to normal position, asshown in Fig. 5.. The feed dog 55 having been released from engagementwith the tooth c is likewise returned by its spring 69 to normalposition, as shown inFig. 5. i The movement of the dog 54 with itscarrier, 57 under the pressureof the escapement Wheel to thepositionshown in Fig. 5is effective to provide a half letter spacemovement of the carriage which is effected at the upstroke of the key.It will be seen therefore that, under the conditions described, a halfletter space drop of the carriage is afforded at the downstrokeof thekey and a half letter. space drop of the carriage is afforded at theupstroke of the key, thereby providing a halfand-half drop to the.extent of a full letterspace ateach actuation of a 'full letterspaceprinting key 26' i a In the present construction I have pro vided meansfor controlling the escapement so asto afi'ord onlyga half letter spacefeed at each actuation ofcertain of the printing keys (designated by thereference numeral, 26) "instead of a full letter-space feed, as

hereinbefore described. Thus some of the characters occupy lesswidthwise space than others, such, for example, as the letter i. When aprinting key 26" is actuated, which controls the ty eson which one ofthese characters is ormed, special controlling means are thrown intooperation to provide for a letter space feed movement of the carriage ofonly, say, half the distance that is afforded by an actuationof theother or full letter-space keys 26. In order to accomplish this result Ihave provided an auxiliary universal bar 73, which extends beneath theseries of key levers 25 in therear of the universal bar 34. Theauxiliary universalbar is connected at its ends to upwardly andforwardly extending arms or links 74 which are pivoted on the pivotscrews 38, which screws widthwise s ace sufiicient to co-act with onlyin Fig. 9. There are four i to turn freely on with the auxiliaryuniversal that a depression of any of likewise constitute pivots for therock shaft 37. The universal bar 73 is provided with one or moresubstantially Ushaped clips 75 which may be made of sheet metal and eachof which is adapted to straddle and be held friction tight on theuniversal bar, as shown in Fig. 8. Each of these clips is provided withan upwardly extending contact portion or projection 76 which may be bentup from the body portion of the clip and occupies a one of the ey levers25 and 25, as shown of these contact devices shown in Fig. 9 althoughthis number may be varied as desired and the contact devices may beadjusted longitudinally of the auxiliary universa bar on which they aresupported so as to bring the contact devices beneath different keylevers if desired.- It will be seen from an inspection of Fig. 9 thatthe key levers 25' which do not cooperate with the contact devices arefree to be to a considerable extent without the key levers intoengagement bar. However, those key levers 25 which co-act with thecontact devices 76 have no such lost motion, since the space betweenthem and the auxiliary universal bar is occupied by the contact devices.It will be understood, therefore,- these key levers 25 will immediatelyeffect a corresponding movement of the auxiliary universal ar throughthe engagement of any of such key levers with the associated projectionor contact device 76.

The auxiliary universal bar carries a rearwardly projecting arm 77 towhich an upwardly extending link 7 8 is pivoted. The upper end of thislink is pivoted to a socalled controlling member or wedging device whichis designated as a whole by the reference numeral 79. This device isprovided with a forwardly projecting arm 80 to which the link 78 isconnected and with an upwardly extending arm 81 provided with aninclined face or wedging portion 82. The controlling device or member 79is pivoted the trunnion-like projection or pivot 45 of the dog rocker,and to receive a pivotal movement on the axis of the dog rocker. Thecontrolling device 79 depressed bringing b'earsat one side against theupright arm 59 of the dog rocker and a sleeve or collar 83 bears againstthe opposite side of the controlling member to hold it against movementlongitudinally of the trunnion 45 in one direction, the arm 59 of thedog rocker preventing a movement of the controlling member in theopposite direction. The collar 83 is fixed to the trunnion 45" by a setscrew 84 received in a tapped opening in the collar and bearing at itsinner end against the trunnion 45.

The controlling member 7 9 has a pivotal movement with and independentlyof the dog rocker.

' ing of the loose dog into engagement with the contact face 72 iseffected by a movement of the controlling member or wedge between thetail piece of the dog and the arm 59, as shown in Fig. 7. The loose dogbeing thus positioned and held by the wedging device no longer acts as aloose dog but 18 maintained fixed against movement around its pivot 67,and temporarily constitutes in ef-' feet a fixed dog. The constructionand arrangement of the parts are such that a depression of one ofprinting keys 26* to the full line position shown in Fig. 6, iseffective to actuate the auxiliary universal bar 73 to turn thecontrolling device 79 from its normal position shown in Fig. 1 to theposition shown in Fig. 6, where the wedge has effected a movement of thedog 55 from the normal position shown in Fig. 5 to that represented inFig.

.7. This movement of the dog 55 carries it back its full extent ofmovement, or approximately a distance between two teeth of theescapement wheel, so that it is adapted to co-act with the nextadvancing tooth b (Fig. 7 of the escapement wheel on the full depressionof the printing key 26 without afiording a drop of the carriage forapproximately a half letter space distance, as previously described.This will be understood from an inspection of Fig. 7 which shows thepositions of the parts after the dog 55 has been cammed against the dogrocker to take up the lost motion that the dog ordinarily has, thuspreventing the partial letter space drop of the carriage that isordinarily effected by such lost motion. It should be understood thatthe depression of the printing key 26 to the full line position shown inFig. 6 is efiective as hereinbefore explained to actuate the controllingdevice and move the dog 55 to the Fig. 7 position, and that thismovement of the dog is effected before motion is transmitted from thesame key to the universal bar 34. It will be seen, therefore, that thedog 55 is moved to the Fig. 7 position before the dog rocker hasreceived a forward rocking movement to disengage the normally engagedfeed dog 54 from the escapement wheel. When, however, the movement ofthe feed dog 55 around its pivot 67 is completed the universal bar 34:will be taken up, and the dog rocker will receive a pivotal movement todisengage the dog at and bring the dog 55 the so-called half space intothe path of the next advancing tooth b (Fig. 7) on the escapement wheelwithout, however, aifordinga drop, orany material extent of drop, to'the carriage. It follows, therefore, that there is no. feedmovement ofthe carriage during the downstroke of the key under the conditionsmentioned. It

i should be understood that after the universal bar 73 has been taken upin the manner described, the controlling device 79moves with the dogrocker, and on the same pivotal center as the dog rocker, and'is thusmain- ;tained wedged between the tail of the dog and the upright arm 59of the dog rocker. The downstroke of'the key which was effective tointerpose the dog 55 in the path of the next advancing tooth b of theescapement wheel'was also effective to release the dog 54, and thespring 62 then moved the.

member 57 and thus advanced the do 54 to a position corresponding tothat in icated in Fig. 4. It follows, therefore, that when pressure isreleased on the depressed finger key the various springs hereinbeforereferred to will return the type action, universal bar 34, and dogrocker to normal position and the dog 54 will be again engaged by thenext advancing tooth of the escapement wheel, whiclilatter when releasedby thedog 55 will force the dog 54 and its car .rier 57 against the ullof the spring 62 to the position shown in Fig. 5, thus affording half ofa full letter-spacedrop of the carriage through a movement of the dog 54with its carrier 57.

A separate returning spring 85 is connected to return the universal bar73 and the parts controlled thereby to normal position. Thus thisspring85 is connected at one end to a pin 86 which projects from thebase of the machine, said sprmg being connected at its opposite end, toan arm 87 which is formed as a part of and projects forwardly from oneof the arms 74. The force of this spring is exerted to elevate theuniversal bar 73 and return the controlling device 79 to its normalosition, shown in Fig. l, where it is with rawn from between the tail 70of the dog 55 and the body portion of the dog rocker. The dog 55 beingthus freed from the wedging device is returned bythe spring 69 to itsnormal position, shown in Fig. 5.

It'will be understood that when the so its upward movement with thereturning key lever 25* under the force of the spring 85.

This independent movement of the universal bar'73 effective to turn thecontrolling device 79 on its pivotal center independently of the dogrocker which has been arrested. It is thisindependent movement of thecontrolling device thatenables the feed dog 55 to. be returned to normalposition around its pivot 67. j i Itshould be understood from theforegoing description that during the operation of the full spaceprinting keys 26 the universal bar 73 will not be taken up and actuated,or will not be actuated to a suflicient extent to int'erpose the wedgingor controlling device 79 between the tail of the dog 55 and the dorocker; butthat the controlling device anc l dog rocker will be movedtogether while the controlling device remains in the inoperativeposition. When, however, a so-called half letter-space printing key 26is depressed the associated contact device or projection 76 causes theuniversal bar 73 to be actuated first, thereby wedging the dog 55against the dog. rockerand taking up the lost motion that is ordinarilyprovided for this dog and causing it to act as a fixed dog, 'so that afeed movement of thecarriagewill at this time beelfected onlyjthroughthe movement of the dog 54 with its carrier 57 around the pivot 58. Itwill be seen,' therefore, that during the actuation of each so-calledfull letter-space key 26 the wedging device is not thrown nto operation,but on the other hand each time a so-called half letter-space print ingkey'26 is actuated the wedging device will be thrown into operation torovide for a half. letter-space only at eac printing operation. i

The rocking movement of the dog rocker is limited by a fixed stop orabutment 88 which projects rearwardly from the bracket plate 48. Screwstops .89 and 90 are carried by the dog rocker and co-actwith the fixedstop 88. The screw 89 passes through a tapped opening in the uprightarm59 of the dog rocker and is locked in its adjusted positionby a locknut 91. The forward end of this screw co-acts with-the rear end of thefixed stop 88 to limit the forward movement of the dog rocker onthedepression of a key. The screw stop 90 is received in and.

extends through a tapped opening in the arm 43 of the dog. rocker andthe upper end of said screw stop co-acts with the fixed stop '88 tolimit the rearward movement ofthe dog rocker. lock nut 92 co-acts withthe screw stop 9 to'hold it against accidental displacement from itsadjusted position.

. From the foregoing description it will be understood that while all ofthe keylevers are operative to actuate the dog rocker, cer tain only ofthekey levers are operative to move the controlling device 79independently of the dog rocker; that at=each actuation of the dog undercontrol of a half lettar-space key 26*, and after a printing operationhas been effected by suchkey, the dog 55 will return to the normalposition, shown in Figs. 2 and 5, where it is ready to act as a loosedog and afford a full letter-space movement of the carriage at the nextactuation of a full letter-space key 26; thatthere being comparativelyfew keys 26, which control the escapement to give a short or halfletterspace feed of the carriage, the escapement operates under normalconditions by the control of the full space keys 26 to afford a fullletter-space feed, whereas when one of the so-called half letter-spacekeys 26 is depressed, the universal bar 73 and the controlling device 97will be actuated to provide an abnormal operation to afford only a halfletterspace feed of the carriage. I

While I have referred herein to variation in the from a half to a fullletter space it should be understood that these terms may be regardedmerely as relative terms, and that the escapement may be arranged toafiord difierent ex tents of feed, and different extents of variationmay be provided.

Various changes may be made without departing from the spirit and scopeof my invention.

What I claim as new and desire to secure by Letters Patent, is

1. In a typewriting machine, the combination of a power driven carriage;printing keys; and variable feed carriage escapementmechanism includinga feed dog operative at one time as a loose dog and at another time as afixed dog, and controlling means controlled by certain only of saidprinting keys for controlling said feed dog to operate as a fixed dogand controlled by certain other of the printing keys to control said dogto operate as a loose dog.

2. In a typewriting machine, the combination of'a power driven carriage;printing keys; and variable feed carriage escapement mechanism includinga normally loose feed dog operative at one time as a loose dog and atanother time as a fixed dog, and controlling means operative by certainonly of said printing keys for moving said dog and taking up themovement that it normally has as a loose dog and causing it to operateas a fixed dog, said controlling means being operative by certain otherof said keys to control said dog to operate as a loose dog.

3. In a typewriting machine, the combination of a power driven carriage,an escapement rack, a dog rocker, a dog carried thereby, a secondnormally loose dog also carried by the dog rocker, printing keys, meanscontrolled by said keys for controlling the movement of said dog rocker,and independent means controlled by certain only of said keys forrendering said second normally loose dog operative as a fixed dog.

a. In atypewritlng machine, the combination of a power driven carriage,an escapeextent of feed of the carriage 7 tion of a power drivencarriage; keys; and variable 'Eeed carriage escapement :mechanismincluding a normally dog operated at one time as a loose at another timeas a fixed dog, means operative by as a loose dog and causing positionafter each ment rack, a dog rocker,

ment rack, a dog rocker, a dog carried thereby, a second normally loosedogalso carried by said rocker, printin keys, means controlled by saidkeys or controlling the movement of said dog rocker, and independentmeans controlled by certain only of said keys for taking up the movementthat said dog normally has as a loose dog and causing it to operate as afixed dog.

5. In a typewriting machine, the combina tion of a power drivencarriage; printing keys; and variable teed carriage escapement mechanismincluding a feed dog operative at one time as a loose dog and at anothertime as a fixed dog, controlling means controlled by certain only ofsaid printing keys for controlling said feed dog to operate as a fixeddog and by certain other of the printing keys to operate as a loose dog,and

means for returning said controlling means to normal position after eachprinting operation to enable said feed dog to'operate as a loose dog.

6. In a typewriting machine, the combinaprinting loose feed dog andcontrolling certain only of said printing keys for moving said dog andtaking up the movement that it normally has it to operate as a fixed dogand operative by certain other of said keys as a loose dog, and meansfor returning said controlling means to normal printing operation toenable the normally loose dog to return to the position where it isoperative to act as such.

7. In a typewriting machine, the combination of a power driven carriage,an escapea feed dog carried thereby, a second normally loose dog alsocarried by the rocker, printing keys, means controlled by said keys forcontrolling the movement of said dog rocker, independent meanscontrolled by certain only of said keys for rendering said secondnormally loose dog operative as a fixed dog, and means for returningsaid independent means to normal position after each printing operationto enable said normally loose dog to act as such.

8. In a typewriting machine, the combination of a power driven carnage;printing Elli ill) lit] keys; and variable feed carriage escapementmechanism comprising an escapementnoenosa keys; and variable teedcarriage escapement mechanism comprising an escapement rack, twonormally loose dogs which cooperate with said rack, each dog normallyaffording 5 a drop of the carriage, and controlling I means oontrolledbycertain only of said printing keys to take up the movement of onerofsaid dogs and to cause it to act as a fixed dog, thereby affording adrop of the carriage only through the other dog.

10. In a typewriting machine, the combi nation of a power drivencarriage; printing keys; and variable feed carriage escape mentmechanism comprising an escapement rack, two normally loose dogs whichcooperate Withsaid rack; each dog when operating as a loose dogaiiording substantially the same extent of drop of the carriage, and

a controlling means controlled by certain only 20 movement of one ofsaid dogs and causing it to act as a fixed dog, thereby affording at ofsaid printing keys 'for taking up the controllingmeans to normalposition after 3 each printing operation to enable both dogs to operateas-loose dogs. p

12. In a typewriting machine, the combination of apower driven carriage;printing keys; and variable feed carriage escapement mechanismcomprising an escapement rack, two normally loose dogs which cooperatewith said rack, each dog normally affording a drop of the carriage,controlling means controlled by certain only of said printing keys totake up the movement of a one of said dogs and to cause it to act as afixed dog, thereby affording adrop of the carriage only through theother dog, and means for returning said controlling means to normalposition after each printing operation to enable a drop of the carriageto be eflected through both dogs i 13. In a typewriting machine, thecombination of a powerdriven carriage; printing rack, two normally loosedogs which 00* operatewith said rack, each dog when oper- B0 the sameextent of drop of the carriage, conating as a loose dog affordingsubstantially trolling means controlled by certain only of said printingkeys for taking up the movement of oneof said dogs andcausing it to actas a fixed dog, thereby afiording at such time only substantially onehalf the extent of feed that thecarriage receiveswhen both dogs operateas loose dogs, and means for returning said controlling means to normalposition after each printing operation to en able both dogs to operateas loose dogs.

14. In a typewriting machine, the combinat on'of a power ClIlVGIlcarriage; printing keys; and variable feed carriage escapement mechanismcomprising a dog rocker,

a feed dog carried thereby, said feed dog i being operative at one timeas a loose dog and at another time as'a fixed dog, a umversal baroperative by any of said printing keys and. operatively connected tosaid dog rocker to actuate it, a second universalbar operative bycertain only of saidprinting keys, and means operative by said seconduniversal bar for controlling said feed dog to operate as a fixed dog.

15. In a typewritingmachine, the combination of a power driven carriage;printing keys and variable feed carriage escapement mechanism comprisinga dog rocker, a normally loose feed .dog carried'thereby, said feeddogbeing operativeat one time as a loose dog and at another time as afixed dog, a universal bar operativeby any of said printing keys andoperatively connected to said dog rocker to actuate it, a

second universal bar operative by certain only oi said printing keys,and controlling means controlled by said second universal bar for movingsaid dog to take up the movement that it normally has as aloose dog,

16. In a typewriting machine, the combination of a power drivencarriage; print ingkeys; and variablefeed carriage escapement mechanismcomprising a dog rocker, two normally loose feed dogs carried thereby, auniversal bar operative by any of said printing keys and operativelyconnected to said dog rockerltoactuate it; a second universal baroperative by certain only of said printing keys, and controlling meansoperated by said second universal bar to control one of said dogs tooperate as a fixed dog.

' 17. In a typewrit-ing machine, the com binatlon of a power drivencarriage; PI'lIll'fi ing keys; and variable teed carriage escape- Inentmechanism comprising a dog rocker, two normally loose feed dogs carriedthereby. each dog when operating as a loose dog afiording substantiallythe same extent of drop of the carriage,a universal bar operative by anyof said printing keys and oper atively connected to said dog rocker toactuate it, a second universal bar operative by certain only of saidprinting keys, and controlling means operated by saidsecond nni versalbar for taking up themovement of one of said dogs and causingit to actas a fixed dog, thereby all'ording a drop of the carriage only throughthe other dog.

Ifm

mil

drop of the carriage, a universal bar oper;

. ative by any of said printing keys and operatively connected to saiddog rocker to actuate it, a second universal bar operative by certainonly of said print-ing keys, and controlling means operated by saidsecond universal bar for taking up the movement of one of said dogs andcausing it to act as a. fixed dog, thereby affording at such time onlsubstantially one half the extent of feed that the'carriage receiveswhen both dogs operate as loose dogs.

19. In a typewriting machine, the combination of a power drivencarriage; printing keys; and variable feed carriage escapement mechanismtherefor comprising a dog rocker, a normally loose dog carried therebyand movable independently thereof, said dog operating at one time as afixed dog and at another time as a loose dog, means controlled by saidprinting keys for actuating said dog rocker, and a wedging devicecontrolled by certain only of said printing keys and cooperative withsaid dog to. hold it against independent movement so as to cause the dogto act as a fixed dog.

20. In a typewriting machine, the combination of a power drivencarriage; print ing keys; and variable feed carriage escapementmechanism therefor comprising a dog rocker, a normally loose dog carriedthereby and movable independently thereof, said dog operating at onetime as a fixed dog and at another time as a loose dog, means controlledby said printing keys for actuating said dog rocker, a wedging devicemovable with and independently of said dog rocker,

and means controlled by certain only of. said printing keys forcontrolling the indeof said wedging device pendent movement to throw itinto cooperation with said dogto effect a movement thereof independentlyof the dog rocker and thereafter hold the dog against independentmovement so as to cause it to act as a fixed dog. I

21. In a typewriting machine, the combination of a power drivencarriage; printing keys; and variable feed carriage escape mentmechanism therefor comprising a dog rocker, a pair of normally loosedogs carried thereby and normally spaced apart, means controlled by saidprinting keys for actuating said dog rocker, and means controlled bycertain only of said printing keys for moving one of said dogs towardthe other to reduce the space between the dogs.

22. In a typewriting machine, the combiloose feed dogs carriedtherenation of a power driven carriage; printing keys; and variable feedcarriage. escapement mechanism therefor comprising a dog rocker, a pairof normally loose dogs carried thereby and normally spaced apart, meanscontrolled by said printing keys for actuating said dog rocker, a wedgindevice movable with and independently 0 said dog rocker and operative bysuch independent movement on one of said dogs to move it toward theother, and means controlled by certain only of said printing keys foreffecting an independent movement of said wedging device.

23. In a typewriting machine, the combination of a power drivencarriage; printing keys; and variable feed carriage escapement mechanismtherefor comprising a dog rocker, a pair of normally loosedogs carriedthereby and normally spaced apart, a universal barcontrolled by saidprinting keys and operatively connected to said dog rocker to actuateit, a wedging device movable with and independently of said dog rockerand operative by such independent movement to hold one of the normallyloose dogs to cause it to operate as a fixed dog, a second universal barcontrolled by certain only of said printing keys, and intermediateconnections between said second universal bar and said wedging device tocontrol the independent movement of the latter.

24. In a typewriting machine, the combination of a power drivencarriage; printing keys; and variable feed carriage escapement mechanismcomprising a universal bar the actuation of which determines when avariation in the normal extent of feed is to be aiforded, actuatingdevices controlled by said printing keys, and adjustable contact devicesinterposed between said actuating devices and said universal bar and anadjustment of which contact devices enables one or another of the keysto actuate said universal bar through an interposed contact device.

25. In a typewriting machine, the combination of a power drivencarriage; printing keys; and variable feed carriage escapement mechanismcomprising a universal bar the actuation of which determines when avariation in the normal extent of feed is to be afforded, actuatingdevices controlled by I said printing keys, and contact devices carriedby and 21(1111Stflbl8 along said universal bar to bring each of saiddevices into cooperative relation with one or another of said keycontrolled actuating devices.

26. In a typewriting machine, the combination of a power drivencarriage; printing keys-,and variable feed carriage escapement mechanismcomprising a universal bar the actuation of which determines when avariation in the normal extent of feed'is to be afforded, actuatingdevices controlled by said printing. keys, substantially U-shaped clipswhich straddle the universal bar and are adjustable to ditferentpositions the same, carried by each of said clipsfor cooperation along ywith one of said key actuated devices, the

adjustment of the clips along the universal bar determining with whichkey controlled actuating devices the contact devices on the clips shallcooperate.

27. In a typewriting machine, the combination of printing key levers; apower driven carriage; and variable feed carriage escapement mechanismaflording different extents of feed depending on which of the key leversare actuated, said escapement mechanism comprising auniversal barcontrolled by any of said key levers, escapement I devices controlledthereby,asecond universal bar controlled by certain only of said keylevers controlling means actuated by said second universal bar, andcontact devices carried by and adjustable along said second universalbar and with eachof which a key lever is adapted to cooperate, theadjustment of said contact devices determining and a projecting contactdevice which of the key levers shall cooperate therewith.

28. In a typewriting machine, the comblnation of a power drivencarriage; ing keys; and variable feed carriage escapement mechanismcomprising a dog rocker, a feed dog carried thereby, said feed dog beingoperative, at one time as a loose print- 1 dog and at anothertime as afixed dog, a

universal bar operative by any of said printing keys and operativelyconnected to said a dog rocker to actuate it, a second universal baroperative by certain only of said printing keys, and controlling meanswhich determines whether the said dog shall be operative as a fixed dogor as a loose dog,

said controlling means being'under control of saidsecond universal bar.a

Signed in the borough of Manhattan, city of New York, in the county ofNew York and State of New York, this lfithday of Dec. A. D. 1912.

ARTHUR W. SMITH.

Witnesses:

CHARLES E. SMITH, M. F. I-IANNWEBER.

